Fastener-holding device



March 4, 1930. J. NEAFIE FASTENER HOLDING DEVICE Filed May '5, 1928 INVENTOR. wt eafie HIS ATTORNEY.

Patented Mar. 4, 1930 UNITED STATES PATENT FFICE ANDREW J. NEAFIE, 0F MOUNTAIN LAKES, NEW JERSEY, ASSIGNOR TO INGERSOLL- RAND COMPANY, OF JEasnY CITY, new

J JERSEY, A CORPORATION OF N EV] JERSEY FASTENER-HOLDING DEVICE Application filed May 5, 1928. Serial No. 275,393.

This invention relates to fastener holding devices, but more particularly to a fastener holding device adapted for attachment to a pneumatic hammer tool of the type employed for driving spikes and similar articles.

One object of the invention is to enable the hammer tool to be readily retained in striking relation with the spike unaffected by the vibration set up in the tool during its operation.

Other objects will be in part obvious and part pointed out hereinafter. In the drawings accompanying the specification and in which similar reference charpartly broken away of the tool.

acters refer to similar parts,

Figure l is a side elevation of a pneumatic tool having the invention applied thereto,

Figure 2 is an enlarged detail elevation the front end of a pneumatic tool and the holding device, and

Figure 3 is a transverse view taken through Figure 2 on the line 3-8 looking in the direction indicated by the arrows.

Referring to the drawings, the invention is shown applied to a pneumatic tool having a cylinder A to the rearward end of which is secured a back head B by means of bolts 0. The back head B is provided With a handle D adapted to be grasped by the operator formanipulating the tool and for applying pressure to the work during the operation of The parts so far described are shown merely for a practical application of the invention and it is to be understood that the invention is not limited in its use to the particular type of tool shown.

. To the front end of the cylinder A is secured a front head Ewhich may be of a well known type to act as a guide for theforward portion of a hammer piston F. The piston F in this instance reciprocates through the front end of the front head E to deliver its blows directly against the work, such as a A. Preferably springs L are disposed on the side rods to bear with one end on lugs O of the purpose of illustrating the front head and With their opposite ends against nuts P threaded on the side rods K to exerta constant tension for the purpose of maintaining the front head E firmly against the cylinder A.

' In accordance with the present invention the side rods K are provided at their forward ends with extensions Q, of somewhat smaller diameter than the body portions of the side rods for the reception of as will be hereinafter'described in detail.

In driving spikes and similar articles with tools of the type illustrated a difficulty frequently encountered is that of maintaining the tool in striking relation with respect to the article intended to be driven. This is due partly to the small area of contact between the striking end of the piston F and the article, such as the spike G, and in part to the terrific Vibration set up in the tool during its operation.

In order that the tool may be readily maintained in the correct position relatively to the spike a sleeve R is disposed on the front head E and said sleeve has a bore S adapted to slidably receive the forward portion of the front head. The bore S may be of any suitable size but is preferably of such diameter that the head of the spike will always be within the striking range of the piston F in any position which the tool may assume on the spike.

On opposite sides of the sleeve R are lugs U in-which are formed apertures V to slidably receive the extensions Q, of the side rods K. Nuts W are threaded on the forward end of the extensions Q to act as abutments for the sleeve and to limit the forward movement of the sleeve on the front head E. Preferably ribs X are formed on the sleeve R and on opposite sides of the apertures V to serve'as guards for the forward extremities of the extensions Q and the nuts W.

In practice, whenever it is desired to drive a spike, the spike may be placed in substantially the correct position relatively to the rail J and the tool may then be seated on the spike and the piston F set in operation. After the spike has been properly started in holding means such s the tie -I-I, theoperator inay applypressure to the handle D and the spike will then be rapidly driven into the tie H to secure the rail J thereto.

As the head T of the spike Gr approaches the rail-flange the front end of thersleeve It Will Contact with the-flange 0f the mean- 1 Will be gradually pushed rearwardly on the front head E in accordance With the degree of penetration or the-spike into t front 'end of the sleeve however; Will at all times be in engagement with the head of the spike,

of the piston consequently/increasing the efli'eiency of the toolrsincethestool may-be operated atmaxies mum speedwith he tullfassurance that every blow-.st-r-uel; by therpiston Wlll'ElOG: effective.

I jela imz v 1. In a bination-off a; :hammer tool having :a cylinder and a front: head, side rods for clamping (the cylinder andnthe front head in" 'assernbled'ire lationship, :ahammer :piston in :the cylinder for delivering bloiws of i1npaet,+a sleeve slid able on-athe' frontihead for guiding ia fastener.

during the driving thereof, lugs on the: sleeve having-apertures to receive the si'dezrods;

sleeve on the front: head: i

2. In a fastener holding device; the con-1+7.

bination' of a hammer toolhaving a cylinder 7 and a front head, spring pressed side iIOd'S for clamping ,the fronthead to thercylindent the side :rodsyza hame a sleeve slidablereduced extensions on mer piston in the cylinder, on theiront head fonmaintaining afastener Within the range'of the blows of, the pistong; lugs on the sleeve having'aperturesrto slid-1:, ably receive the extensions,

extensions head.

ANDREWJ. NEAFIE;

"e-tie." The thus assurlng the correct'position" F relatively to the, spike and.-

fastener holding device; :the ncome:

and nuts on thewsi'derods for: maintaining the and 1 nuts on: the for limiting; the forward; move: ment of vthe sleeve 'relativel yr'to the drone In testimonywhereof I have signedthis; 1 specification. 

